EP2934769B1 - Coating method and panel having such a coating - Google Patents

Coating method and panel having such a coating Download PDF

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Publication number
EP2934769B1
EP2934769B1 EP13821853.2A EP13821853A EP2934769B1 EP 2934769 B1 EP2934769 B1 EP 2934769B1 EP 13821853 A EP13821853 A EP 13821853A EP 2934769 B1 EP2934769 B1 EP 2934769B1
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EP
European Patent Office
Prior art keywords
during step
diluent
coating process
acetate
hardener
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EP13821853.2A
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German (de)
French (fr)
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EP2934769A1 (en
Inventor
Dominique Simon
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Sarl Simon (cepi)
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Sarl Simon (cepi)
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified

Definitions

  • the present invention relates to a painting process for wall renovation such as biological or pharmaceutical research laboratories, food or cosmetic production sites, premises used by the microelectronics industry, aeronautical or even nuclear, often named clean room.
  • Hydrogen peroxide is used to disinfect clean rooms. Hydrogen peroxide is the substitute for formalin which was stopped by decree following the judgment of January 5, 1993. Hydrogen peroxide, also called hydrogen peroxide, allows sterilization, that is to say, complete destruction. all microorganisms, including bacterial spores, and disinfection, that is, the destruction and elimination of specific types of microorganisms.
  • hydrogen peroxide is in the form of gas.
  • 30% liquid hydrogen peroxide is vaporized to obtain about 1200 ppm.
  • the steam breaks down into water and non-toxic oxygen and provides a sterilizing action to decontaminate the equipment and materials of the containment laboratories.
  • the cleanroom partitions must show performance imposed by the constraints of control of this contamination. Therefore, the surface condition of the panels must be preserved over time. But sometimes incidents related to the activity compromise the performance due to scratches or chemical alteration of the surface. For example, during the decontamination phase, the scratches will cause the paint panels to blister, which over time will peel off.
  • the document FR2915690 discloses a method of painting a non-metallic support comprising sanding steps to smooth the support, applying several layers of automotive primer diluted to about 50%, sanding before each layer, coating application with automobile body putty to make up for the defects of the support, the application of a layer of varnish and polish. Thanks to this process, it is found a water-repellent smooth surface, glossy and resistant.
  • this method does not allow to be adapted to the sheet metal of the panels of a clean room since they are metallic.
  • this method is not adapted to withstand hydrogen peroxide decontamination.
  • the document WO2007 / 054304 discloses an epoxy-based primer composition comprising at least 10% zinc oxide by weight. However, this process is not suitable for resisting hydrogen peroxide decontamination.
  • the object of the present invention is to overcome these disadvantages and to propose a method of repair and renovation of panels forming a clean room while resisting the decontamination of hydrogen peroxide.
  • a clean room is a room or series of rooms where particle concentration is controlled to minimize the introduction, generation, retention of particles within, typically for a specific industrial or research purpose.
  • the thickness of the primer and the thickness of the topcoat ensure long life and resistance to decontamination of hydrogen peroxide.
  • composition of the primer and topcoat makes it possible to resist the decontamination of hydrogen peroxide.
  • step a) consists in de-silicone, sand or strip the area to be treated and then clean and degrease the area to be treated.
  • step c) consists of allowing a minimum of 48 hours to dry, sanding the primer to smooth it and rinsing the primer with clear water then wipe, dab with greasy pad to dust off .
  • step b) the primer layer is applied to the gun in crossed layers and in step d), the topcoat is applied to the gun in crossed layers, preferably in crossed layers oblique to the ground. Thus, it is avoided to see the direction of painting appear.
  • the invention also relates to a panel covered with such a coating.
  • the invention relates to a coating method and in particular to a panel coating method.
  • the area to be treated must take into account the constraints of a room without dust.
  • the area to be treated is equipped with plasticized tarpaulins that help protect the rest of the room from any dust or paint spray. Air conditioning and lights are hidden and ventilation may be installed at emergency exits through exhaust ducts.
  • the layout of all these elements is based on the location of the premises and the extent of the areas to be treated.
  • the sanding is done using pneumatic suction sanders whose output is equipped with a filter, which limits the production of dust.
  • the figure 1 shows the damage 1 related to decontamination with hydrogen peroxide.
  • the sanding When the panel is damaged by decontamination or decontamination with hydrogen peroxide, the sanding is deepened until there is no more paint so as to see the panel sheet to be coated. If the panel is not damaged, sanding may be superficial.
  • the preparation of the area to be treated can be carried out by the use of a degreaser having a low density such as 0.86.
  • the figure 2 shows the application of the method on a panel 2 and in particular step b) of applying at least one layer of a primer 3 until a thickness of the order of 150 to 450 micrometers is obtained, and step d) of applying at least one topcoat layer 4 until a thickness of the order of 150 to 450 micrometers is obtained.
  • the panel 2 consists of two sheet metal plates and a rock wool between the two sheet metal plates.
  • the application of the primer layer is repeated four times to obtain a layer of 300 microns and the application of the topcoat is repeated four times to obtain a layer of 300 microns.
  • the layer of a primer 3 is composed of 10 volumes of epoxy and 2 volumes of hardener.
  • the epoxy is composed of 25% (10-25%) of xylene, 25% (10-25%) epoxy resin 700 ⁇ average pm ⁇ 1100, 10% (2.5-10%) zinc phosphate , 10% (2.5-10%) of 1-methoxy-2-propanol, 10% (2.5-10%) of average epoxy resins ⁇ 700, 10% (2.5-10%) ) of ethylbenzene, 2.5% (1-2.5%) of heavy naphtha hydrodesulphide and 0.8% ( ⁇ 1%) of light aromatic naphtha.
  • the remainder of the epoxy is diluent to achieve 100% epoxy volume.
  • the hardener of the primer is composed of 25% (10-25%) of xylene, 25% (10-25%) of C8 aromatic hydrocarbons, 10% (2.5-10%) d ethylbenzene, 10% (2.5-10%) of 2,4,6-tris (dimethylaminomethyl) phenol, 10% (2.5-10%) of 6-diazaoctane-1,8-diamine and 2.5% (1-2.5%) of butanol.
  • a hardener is used, the composition of which is as follows: 40% (25-50%) of C8 aromatic hydrocarbons, 40% (25-50%) of homopolymer 1,6-hexamethylene diisocyanate 10% (10-25%) of 2-methoxy-1-methylethyl acetate, 0.4% ( ⁇ 0.5%) of hexamethylene diisocyanate.
  • the remainder of the hardener is diluent to achieve 100% hardener volume.
  • the diluent is composed of 75% (50-75%) C8 aromatic hydrocarbons, 50% (25-50%) butanol and 25% (10-25%) 4-methylpentane-2- one, also called methyl isobutyl ketone.
  • the diluent is composed of 25% (10-25%) of isobutyl acetate, 25% (25-50%) of aromatic hydrocarbons C9, 49.8% (25-50% ) of 2-methoxy-1-methylethyl acetate and 0.2% ( ⁇ 0.5%) of 2-methoxypropyl acetate.
  • the topcoat 4 is composed of 2 volumes of polyurethane, 1 volume of a hardener.
  • Polyurethane is composed of 25% (10-25%) of 2-methoxy-1-methylethyl acetate, 10% (2.5-10%) of Nbutyl acetate, 2.5% (1- 2.5%) of light aromatic naphtha, 2.5% (1-2.5%) of isobutyl acetate and 2.5% (1-2.5%) of heavy naphtha hydrodesulphide.
  • the rest of the polyurethane is diluent to achieve 100% polyurethane volume.
  • the topcoat hardener is composed of 40% (25-50%) of C8 aromatic hydrocarbons, 40% (25-50%) of hexamethylene 1,6-diisocyanate homopolymer, 10% ( 10-25%) of 2-methoxy-1-methylethyl acetate, 0.4% ( ⁇ 0.5%) of hexamethylene diisocyanate.
  • a hardener whose composition is as follows: 25% (10-25%) of xylene, 25% (10-25%) of aromatic hydrocarbons in C8, 10% (2.5-10%) of ethylbenzene , 10% (2.5-10%) of 2,4,6-tris (dimethylaminomethyl) phenol, 10% (2.5-10%) of 6-diazaoctane-1,8-diamine and 2.5% ( 1-2.5%) of butanol.
  • the remainder of the hardener is diluent to achieve 100% hardener volume.
  • the diluent is composed of 50% (25-50%) of isobutyl acetate, 30% (25-50%) of C8 aromatic hydrocarbons and 20% (10-25%) of acetate.
  • the diluent is composed of 50% (25-50%) of isobutyl acetate, 30% (25-50%) of C8 aromatic hydrocarbons and 20% (10-25%) of acetone or according to another variant the diluent is composed of 25% (10-25%) of isobutyl acetate, 25% (25-50%) of C9 aromatic hydrocarbons, 49.8% (25- 50%) of 2-methoxy-1-methylethyl acetate and 0.2% ( ⁇ 0.5%) of 2-methoxypropyl acetate.
  • the painting is carried out by low-pressure spraying for panels, false ceilings and doors, in several layers crossed until a perfect smoothing.
  • the test consists in testing the resistance of the coating in contact with hydrogen peroxide to 35 volumes of hydrogen peroxide deposited on the horizontally disposed plates, either in the form of drops of the order of about 5 mm in diameter, or fine droplets sprayed in the form of a fog.
  • This table shows tests performed in extreme conditions with a particle rate of 2000 / ppm.
  • the minimum acceptable is therefore the thickness of 182 micrometers (including all two layers of primer and finish).
  • Applying a primer of a minimum of 100 microns and a topcoat of a minimum of 100 microns will ensure a coating thickness of at least 200 microns.
  • the minimum thickness of 200 microns as indicated in the coating process, largely withstands hydrogen peroxide decontamination.
  • the decontamination phase takes place with a particle ratio between 50 and 450 / ppm.
  • the particle rate is significantly lower than the tests performed with a particle rate of 2000 / ppm. In this way, the thickness of all two layers (primer and finish, at least 200 micrometers) is sufficient to withstand the decontamination phase of hydrogen peroxide.
  • the coating has no visual defect or hardness modification to the nail.
  • the coating has a satisfactory performance with respect to hydrogen peroxide at 23 ° C. for contact times of less than 6 hours.
  • the spray of hydrogen peroxide, in the form of a fine mist, does not cause any disorder.
  • the contact time is limited because of the rapid evaporation of the product.
  • This coating process applied to the panels provides enclosures supporting decontamination with hydrogen peroxide.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Description

Domaine technique et état de l'artTechnical field and state of the art

La présente invention se rapporte à un procédé de peinture visant la rénovation murale telle que des laboratoires de recherche biologique ou pharmaceutique, de sites de production agro alimentaire ou cosmétique, de locaux utilisés par l'industrie micro-électronique, aéronautique ou même nucléaire, souvent nommés salle blanche.The present invention relates to a painting process for wall renovation such as biological or pharmaceutical research laboratories, food or cosmetic production sites, premises used by the microelectronics industry, aeronautical or even nuclear, often named clean room.

Ces zones à traiter sont constituées de plusieurs panneaux en tôle. Le fait de rénover les panneaux évite un démontage total des différentes parties de la salle blanche puis son remontage. Le temps de manipulation est important car ces panneaux sont fixés sur des rails qui se trouvent eux-mêmes fixés aux murs et souvent encastrés dans le plafond et la résine de sol du bâtiment. La réparation sans le démontage apparaît être une solution plus simple car elle évite de suspendre, pendant un certain temps, l'activité des salles blanches.These areas to be treated consist of several sheet metal panels. Refurbishing the panels avoids total disassembly of the various parts of the clean room and then reassembly. The handling time is important because these panels are fixed on rails which are themselves fixed to the walls and often embedded in the ceiling and the floor resin of the building. Repair without dismantling appears to be a simpler solution because it avoids suspending, for a certain time, the activity of clean rooms.

Le peroxyde d'hydrogène est utilisé pour désinfecter les salles blanches. Le peroxyde d'hydrogène est le remplaçant du formol qui a été arrêté par décret suivant l'arrêt du 5 janvier 1993. Le peroxyde d'hydrogène, appelé également eau oxygénée, permet la stérilisation, c'est-à-dire la destruction complète de tous les microorganismes, y compris les spores bactériennes, et la désinfection, c'est-à-dire la destruction et l'élimination de types précis de microorganismes.Hydrogen peroxide is used to disinfect clean rooms. Hydrogen peroxide is the substitute for formalin which was stopped by decree following the judgment of January 5, 1993. Hydrogen peroxide, also called hydrogen peroxide, allows sterilization, that is to say, complete destruction. all microorganisms, including bacterial spores, and disinfection, that is, the destruction and elimination of specific types of microorganisms.

L'utilisation du peroxyde d'hydrogène se fait à l'état de gaz. Par exemple, le peroxyde d'hydrogène liquide à 30% est vaporisé pour obtenir environ 1200ppm. La vapeur se fractionne en eau et en oxygène non toxique et permet d'avoir une action stérilisante pour décontaminer les appareils et le matériel des laboratoires de confinement.The use of hydrogen peroxide is in the form of gas. For example, 30% liquid hydrogen peroxide is vaporized to obtain about 1200 ppm. The steam breaks down into water and non-toxic oxygen and provides a sterilizing action to decontaminate the equipment and materials of the containment laboratories.

Les cloisons des salles blanches doivent afficher des performances imposées par les contraintes de maîtrise de cette contamination. C'est pourquoi, l'état de surface des panneaux doit se conserver au cours du temps. Mais il arrive que des incidents liés à l'activité viennent compromettre ces performances dues aux rayures ou à l'altération chimique de la surface. Par exemple, lors de la phase de décontamination, les rayures vont faire cloquer la peinture des panneaux qui, avec le temps, va s'écailler.The cleanroom partitions must show performance imposed by the constraints of control of this contamination. Therefore, the surface condition of the panels must be preserved over time. But sometimes incidents related to the activity compromise the performance due to scratches or chemical alteration of the surface. For example, during the decontamination phase, the scratches will cause the paint panels to blister, which over time will peel off.

Le document FR2915690 décrit un procédé de peinture d'un support non métallique comprenant des étapes de ponçage pour lisser le support, l'application de plusieurs couches d'apprêt automobile dilué à environ 50%, de ponçage avant chaque couche, l'application d'enduit
au mastic de carrosserie automobile pour rattraper les défauts du support, l'application d'une couche de vernis et de lustrage. Grâce à ce procédé, il est constaté un état de surface lisse hydrofuge, brillante et résistante. Toutefois, ce procédé ne permet pas d'être adapté à la tôle des panneaux d'une salle blanche puisque ceux-ci sont métalliques. De plus, ce procédé n'est pas adapté à résister à la décontamination au peroxyde d'hydrogène.The document FR2915690 discloses a method of painting a non-metallic support comprising sanding steps to smooth the support, applying several layers of automotive primer diluted to about 50%, sanding before each layer, coating application
with automobile body putty to make up for the defects of the support, the application of a layer of varnish and polish. Thanks to this process, it is found a water-repellent smooth surface, glossy and resistant. However, this method does not allow to be adapted to the sheet metal of the panels of a clean room since they are metallic. In addition, this method is not adapted to withstand hydrogen peroxide decontamination.

Le document WO2007/054304 décrit une composition d'apprêt à base d'époxy comprenant au moins 10% d'oxyde de zinc en poids. Toutefois, ce procédé n'est pas adapté à résister à la décontamination au peroxyde d'hydrogène.The document WO2007 / 054304 discloses an epoxy-based primer composition comprising at least 10% zinc oxide by weight. However, this process is not suitable for resisting hydrogen peroxide decontamination.

Le but de la présente invention est de pallier à ces inconvénients et de proposer un procédé de réparation et de rénovation de panneaux formant une salle blanche tout en résistant à la décontamination du peroxyde d'hydrogène.The object of the present invention is to overcome these disadvantages and to propose a method of repair and renovation of panels forming a clean room while resisting the decontamination of hydrogen peroxide.

Description de l'inventionDescription of the invention

L'invention concerne un procédé de revêtement comportant les étapes successives suivantes :

  • a) préparation de la zone à traiter,
  • b) application d'au moins une couche d'un apprêt jusqu'à obtention d'une épaisseur de l'ordre de 100 à 450 micromètres, ladite couche d'apprêt étant composée d'au moins 10 volumes d'époxy, 2 volumes de durcisseur et entre 0 et 2 volumes de diluant, dont l'époxy comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total d'époxy qui est de :
    • xylène : 10- 25%,
    • résine epoxy 700 < pm moyen < 1100 : 10- 25%,
    • phosphate de zinc : 2,5 - 10 %,
    • 1-methoxy-2-propanol : 2,5 - 10 %,
    • résines epoxydiques pm moyen < 700 : 2,5 - 10 %,
    • ethylbenzene : 2,5 - 10 %,
    • naphta lourd hydrodesulfure : 1 - 2,5%,
    • naphta aromatique léger : < 1%,
  • c) reconditionnement de la zone à traiter,
  • d) application d'au moins une couche de finition jusqu'à obtention d'une épaisseur de l'ordre de 100 à 450 micromètres, ladite couche de finition étant composée d'au moins 2 volumes de polyuréthane, 1 volume d'un durcisseur et entre 0 et 10% d'un diluant, dont le polyuréthane comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total de polyuréthane qui est de :
    • acetate de 2-methoxy-1-methylethyle : 10 - 25%,
    • acetate de Nbutyle : 2,5-10%,
    • naphta aromatique leger : 1 - 2,5%,
    • acetate d'isobutyle : 1 - 2,5%,
    • naphta lourd hydrodesulfure : 1 - 2,5%.
The invention relates to a coating method comprising the following successive steps:
  • a) preparation of the area to be treated,
  • b) applying at least one layer of a primer to a thickness of about 100 to 450 microns, said primer being composed of at least 10 epoxy volumes, 2 volumes of hardener and between 0 and 2 volumes of diluent, the epoxy of which comprises at least the following ingredients given in concentration by mass with respect to the total volume of epoxy which is:
    • xylene: 10-25%,
    • epoxy resin 700 <average pm <1100: 10-25%,
    • zinc phosphate: 2.5 - 10%,
    • 1-methoxy-2-propanol: 2.5 - 10%,
    • average epoxy resins <700: 2.5 - 10%,
    • ethylbenzene: 2.5 - 10%,
    • heavy naphtha hydrodesulphide: 1 - 2.5%,
    • light aromatic naphtha: <1%,
  • c) repackaging of the area to be treated,
  • d) applying at least one topcoat to a thickness of about 100 to 450 microns, said topcoat being composed of at least 2 volumes of polyurethane, 1 volume of a hardener and between 0 and 10% of a diluent, the polyurethane of which comprises at least the following ingredients given in mass concentration relative to the total volume of polyurethane which is:
    • 2-methoxy-1-methylethyl acetate: 10 - 25%,
    • Nbutyl acetate: 2.5-10%,
    • light aromatic naphtha: 1 - 2,5%,
    • isobutyl acetate: 1 - 2.5%,
    • heavy naphtha hydrodesulphide: 1 - 2.5%.

Le procédé de revêtement ainsi décrit permet de résister à la décontamination du peroxyde d'hydrogène. Ledit procédé concerne un procédé de revêtement mural de salle blanche. Une salle blanche est une pièce ou une série de pièces où la concentration particulaire est maîtrisée afin de minimiser l'introduction, la génération, la rétention de particules à l'intérieur, généralement dans un but spécifique industriel ou de recherche.The coating process thus described makes it possible to resist the decontamination of hydrogen peroxide. The method relates to a cleanroom wall cladding process. A clean room is a room or series of rooms where particle concentration is controlled to minimize the introduction, generation, retention of particles within, typically for a specific industrial or research purpose.

L'épaisseur de la couche d'apprêt et l'épaisseur de la couche de finition permettent d'assurer une longévité importante en plus de résister à la décontamination du peroxyde d'hydrogène.The thickness of the primer and the thickness of the topcoat ensure long life and resistance to decontamination of hydrogen peroxide.

Le choix spécifique de la composition de la couche d'apprêt et de la couche de finition permet de résister à la décontamination du peroxyde d'hydrogène.The specific choice of the composition of the primer and topcoat makes it possible to resist the decontamination of hydrogen peroxide.

La réparation de ces panneaux sans le démontage permet de gagner un temps considérable par rapport au démontage complet d'une pièce.The repair of these panels without disassembly saves considerable time compared to the complete disassembly of a room.

Ce procédé permet de réaliser un grand nombre d'interventions :

  • la rénovation de panneau sandwich comme par exemple une laine de roche entre deux plaques métalliques, lisse, nervuré, en polyéthylène, en stratifié, ou en bois compressé...
  • la restauration de portes, notamment coupe-feu, blindées, isotherme...
  • la réparation de bardage intérieur et extérieur,
  • la pose de panneaux en polyéthylène, panneaux traditionnels, portes, huisseries...
  • la peinture sur des pièces mécaniques, électroniques, militaires, nucléaires...
This process makes it possible to carry out a large number of interventions:
  • the renovation of sandwich panel such as a rock wool between two metal plates, smooth, ribbed, polyethylene, laminate, or compressed wood ...
  • the restoration of doors, including fireproof, armored, isothermal ...
  • interior and exterior cladding repairs,
  • the installation of polyethylene panels, traditional panels, doors, door frames ...
  • painting on mechanical, electronic, military and nuclear parts ...

De préférence, l'étape a) consiste à dé-siliconer, poncer ou décaper la zone à traiter puis de la nettoyer et dégraisser la zone à traiter.Preferably, step a) consists in de-silicone, sand or strip the area to be treated and then clean and degrease the area to be treated.

De préférence également, l'étape c) consiste à laisser sécher un minimum pendant 48 heures, à poncer la couche d'apprêt pour la lisser et à rincer l'apprêt à l'eau claire puis essuyer, tamponner au tampon gras afin de dépoussiérer.Also preferably, step c) consists of allowing a minimum of 48 hours to dry, sanding the primer to smooth it and rinsing the primer with clear water then wipe, dab with greasy pad to dust off .

Selon un autre aspect de l'invention, lors de l'étape b) ou lors de l'étape d), le durcisseur comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total du durcisseur qui est de :

  • xylène : 10-25%,
  • hydrocarbures aromatiques en C8 : 10-25%,
  • éthylbenzène : 2,5-10%,
  • 2,4,6-trisphénol : 2,5-10%,
  • 3,6-diazaoctane-1,8-diamine : 2,5-10%,
  • butanol : 1-2,5%.
According to another aspect of the invention, during step b) or during step d), the hardener comprises at least the following ingredients given in mass concentration relative to the total volume of the hardener which is:
  • xylene: 10-25%,
  • aromatic hydrocarbons in C8: 10-25%,
  • ethylbenzene: 2.5-10%,
  • 2,4,6-trisphenol: 2.5-10%,
  • 3,6-diazaoctane-1,8-diamine: 2.5-10%,
  • butanol: 1-2.5%.

Selon une variante, lors de l'étape b) ou lors de l'étape d), le durcisseur comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total du durcisseur qui est de :

  • hydrocarbures aromatiques en C8 : 25-50%,
  • homopolymère 1,6-diisocyanate d'hexaméthylène : 25-50%,
  • acétate de 2-méthoxy-1-méthyléthyle : 10-25%,
  • diisocyanate d'hexaméthylène : <0,5%.
According to a variant, during step b) or during step d), the hardener comprises at least the following ingredients given in concentration by mass relative to the total volume of the hardener which is:
  • aromatic hydrocarbons in C8: 25-50%,
  • homopolymer 1,6-hexamethylene diisocyanate: 25-50%,
  • 2-methoxy-1-methylethyl acetate: 10-25%,
  • hexamethylene diisocyanate: <0.5%.

Selon une autre variante, lors de l'étape b) ou lors de l'étape d), le diluant comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total du diluant qui est de :

  • acétate d'isobutyle : 25 - 50%,
  • hydrocarbures aromatiques C8 : 25 - 50%,
  • acétate de 2-méthoxy-1-méthyléthyle ou acétone : 10-25%.
According to another variant, during step b) or during step d), the diluent comprises at least the following ingredients given in concentration by mass relative to the total volume of the diluent which is:
  • isobutyl acetate: 25 - 50%,
  • C8 aromatic hydrocarbons: 25 - 50%,
  • 2-methoxy-1-methylethyl acetate or acetone: 10-25%.

Egalement, selon une autre variante, lors de l'étape b) ou lors de l'étape d), le diluant comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total du diluant qui est de :

  • acétate d'isobutyle : 10 - 25%,
  • hydrocarbures aromatiques C9 : 25 - 50%,
  • acétate de 2-méthoxy-1-méthyléthyle : 25-50%,
  • acétate de 2-méthoxypropyle : < 0,5%
Also, according to another variant, during step b) or during step d), the diluent comprises at least the following ingredients given in concentration by mass relative to the total volume of the diluent which is:
  • isobutyl acetate: 10 - 25%,
  • aromatic hydrocarbons C9: 25 - 50%,
  • 2-methoxy-1-methylethyl acetate: 25-50%,
  • 2-methoxypropyl acetate: <0.5%

Selon une préférence, lors de l'étape b) ou lors de l'étape d), le diluant comprend au moins les ingrédients suivants donnés en concentration massique par rapport au volume total du diluant qui est de :

  • hydrocarbures aromatiques en C8 : 50 - 75%,
  • butanol : 25 - 50%,
  • 4-méthylpentane-2-one : 10 - 25 %.
According to one preference, during step b) or during step d), the diluent comprises at least the following ingredients given in concentration by mass relative to the total volume of the diluent which is:
  • aromatic hydrocarbons in C8: 50 - 75%,
  • butanol: 25 - 50%,
  • 4-methylpentan-2-one: 10-25%.

Selon une autre préférence, lors de l'étape b) la couche d'apprêt est appliquée au pistolet en couches croisées et lors de l'étape d), la couche de finition est appliquée au pistolet en couches croisées, de préférence en couches croisées obliques par rapport au sol. Ainsi, il est évité de voir apparaître la direction de la peinture.According to another preference, during step b) the primer layer is applied to the gun in crossed layers and in step d), the topcoat is applied to the gun in crossed layers, preferably in crossed layers oblique to the ground. Thus, it is avoided to see the direction of painting appear.

L'invention concerne également un panneau recouvert d'un tel revêtement.The invention also relates to a panel covered with such a coating.

Brève description des figuresBrief description of the figures

D'autres caractéristiques et avantages de l'invention apparaîtront à la lumière de la description qui suit, réalisée sur la base des dessins annexés. Ces exemples sont donnés à titre non limitatif. La description est à lire en relation avec les dessins annexés dans lesquels :

  • la figure 1 représente une vue d'un panneau ayant été détérioré par la décontamination au peroxyde d'hydrogène,
  • la figure 2 représente une vue en perspective d'un panneau ayant un revêtement selon l'invention.
Other features and advantages of the invention will become apparent in the light of the following description, made on the basis of the accompanying drawings. These examples are given in a non-limiting manner. The description is to be read in conjunction with the appended drawings in which:
  • the figure 1 represents a view of a panel having been deteriorated by hydrogen peroxide decontamination,
  • the figure 2 represents a perspective view of a panel having a coating according to the invention.

Description de modes de réalisation de l'inventionDescription of Embodiments of the Invention

L'invention concerne un procédé de revêtement et notamment un procédé de revêtement pour panneau.The invention relates to a coating method and in particular to a panel coating method.

La zone à traiter doit tenir compte des contraintes d'une salle sans poussière. Tout d'abord, la zone à traiter est équipée de bâches plastifiées qui permettent de protéger le reste de la salle de toute poussière ou projection de peinture. La climatisation et les luminaires sont cachés et il est possible qu'une ventilation soit installée aux issues de secours par le biais de gaines d'extraction. La disposition de tous ces éléments se fait en fonction de l'implantation des locaux et de l'étendue des zones à traiter.The area to be treated must take into account the constraints of a room without dust. First of all, the area to be treated is equipped with plasticized tarpaulins that help protect the rest of the room from any dust or paint spray. Air conditioning and lights are hidden and ventilation may be installed at emergency exits through exhaust ducts. The layout of all these elements is based on the location of the premises and the extent of the areas to be treated.

Lors des opérations polluantes comme l'étape de ponçage et d'application de couche de peinture, il est nécessaire de limiter l'émission particulaire.During polluting operations such as the sanding step and the application of the paint layer, it is necessary to limit the particulate emission.

Par exemple, le ponçage est réalisé à l'aide de ponceuses aspirantes pneumatiques dont la sortie est équipée d'un filtre, ce qui limite la production de poussières.For example, the sanding is done using pneumatic suction sanders whose output is equipped with a filter, which limits the production of dust.

La figure 1 montre les dommages 1 liés à la décontamination au peroxyde d'hydrogène.The figure 1 shows the damage 1 related to decontamination with hydrogen peroxide.

Lorsque le panneau est endommagé par la décontamination ou la décontamination au peroxyde d'hydrogène, le ponçage est approfondi jusqu'à ce qu'il n'y ait plus de peinture de sorte à voir la tôle du panneau à revêtir. Si le panneau n'est pas endommagé, le ponçage peut être superficiel.When the panel is damaged by decontamination or decontamination with hydrogen peroxide, the sanding is deepened until there is no more paint so as to see the panel sheet to be coated. If the panel is not damaged, sanding may be superficial.

La préparation de la zone à traiter peut être effectuée par l'utilisation d'un dégraissant ayant une faible densité comme 0,86.The preparation of the area to be treated can be carried out by the use of a degreaser having a low density such as 0.86.

La figure 2 montre l'application du procédé sur un panneau 2 et notamment l'étape b) d'application d'au moins une couche d'un apprêt 3 jusqu'à obtention d'une épaisseur de l'ordre de 150 à 450 micromètres, et l'étape d) d'application d'au moins une couche de finition 4 jusqu'à obtention d'une épaisseur de l'ordre de 150 à 450 micromètres.The figure 2 shows the application of the method on a panel 2 and in particular step b) of applying at least one layer of a primer 3 until a thickness of the order of 150 to 450 micrometers is obtained, and step d) of applying at least one topcoat layer 4 until a thickness of the order of 150 to 450 micrometers is obtained.

Par exemple, le panneau 2 est constitué de deux plaques de tôle et d'une laine de roche entre les deux plaques de tôle. L'application de la couche d'un apprêt est répétée quatre fois pour obtenir une couche de 300 micromètres et l'application de la couche de finition est répétée quatre fois pour obtenir une couche de 300 micromètres.For example, the panel 2 consists of two sheet metal plates and a rock wool between the two sheet metal plates. The application of the primer layer is repeated four times to obtain a layer of 300 microns and the application of the topcoat is repeated four times to obtain a layer of 300 microns.

Par exemple, la couche d'un apprêt 3 est composée de 10 volumes d'époxy et 2 volumes de durcisseur. L'époxy est composé de 25% (10-25%) de xylène, 25% (10-25%) de résine epoxy 700 < pm moyen < 1100, de 10% (2,5-10%) de phosphate de zinc, de 10% (2,5-10%) de 1-methoxy-2-propanol, de 10% (2,5-10%) de résines epoxydiques pm moyen < 700, de 10% (2,5-10%) d'ethylbenzene, de 2,5% (1-2,5%) de naphta lourd hydrodesulfure et de 0,8% (<1%)de naphta aromatique léger. Le reste de l'époxy étant du diluant pour arriver à 100% de volume d'époxy. Le durcisseur de la couche d'apprêt est composé de 25% (10-25%) de xylène, de 25% (10-25%) d'hydrocarbures aromatiques en C8, de 10% (2,5-10%) d'éthylbenzène, de 10% (2,5-10%) de 2,4,6-tris(dimethylaminomethyl)phénol, de 10% (2,5-10%) de 6-diazaoctane-1,8-diamine et de 2,5% (1-2,5%) de butanol. Selon une variante, il est utilisé un durcisseur dont la composition est la suivante : 40% (25-50%) d'hydrocarbures aromatiques en C8, 40% (25-50%) d'homopolymère 1,6-diisocyanate d'hexaméthylène, 10% (10-25%) d'acétate de 2-méthoxy-1-méthyléthyle, 0,4% (<0,5%) de diisocyanate d'hexaméthylène. Le reste du durcisseur étant du diluant pour arriver à 100% de volume de durcisseur. De préférence, le diluant est composé de 75% (50-75%) d'hydrocarbures aromatiques C8, de 50% (25-50%) de butanol et de 25% (10-25%) de 4-méthylpentane-2-one, appelé aussi méthylisobutylcétone. Dans une variante, le diluant est composé de 25% (10-25%) d'acétate d'isobutyle, de 25% (25-50%) de d'hydrocarbures aromatiques C9, de 49,8% (25-50%) d'Acétate de 2-méthoxy-1-méthyléthyle et de 0.2% (<0.5%) d'acétate de 2-méthoxypropyle.For example, the layer of a primer 3 is composed of 10 volumes of epoxy and 2 volumes of hardener. The epoxy is composed of 25% (10-25%) of xylene, 25% (10-25%) epoxy resin 700 <average pm <1100, 10% (2.5-10%) zinc phosphate , 10% (2.5-10%) of 1-methoxy-2-propanol, 10% (2.5-10%) of average epoxy resins <700, 10% (2.5-10%) ) of ethylbenzene, 2.5% (1-2.5%) of heavy naphtha hydrodesulphide and 0.8% (<1%) of light aromatic naphtha. The remainder of the epoxy is diluent to achieve 100% epoxy volume. The hardener of the primer is composed of 25% (10-25%) of xylene, 25% (10-25%) of C8 aromatic hydrocarbons, 10% (2.5-10%) d ethylbenzene, 10% (2.5-10%) of 2,4,6-tris (dimethylaminomethyl) phenol, 10% (2.5-10%) of 6-diazaoctane-1,8-diamine and 2.5% (1-2.5%) of butanol. According to one variant, a hardener is used, the composition of which is as follows: 40% (25-50%) of C8 aromatic hydrocarbons, 40% (25-50%) of homopolymer 1,6-hexamethylene diisocyanate 10% (10-25%) of 2-methoxy-1-methylethyl acetate, 0.4% (<0.5%) of hexamethylene diisocyanate. The remainder of the hardener is diluent to achieve 100% hardener volume. Preferably, the diluent is composed of 75% (50-75%) C8 aromatic hydrocarbons, 50% (25-50%) butanol and 25% (10-25%) 4-methylpentane-2- one, also called methyl isobutyl ketone. In a variant, the diluent is composed of 25% (10-25%) of isobutyl acetate, 25% (25-50%) of aromatic hydrocarbons C9, 49.8% (25-50% ) of 2-methoxy-1-methylethyl acetate and 0.2% (<0.5%) of 2-methoxypropyl acetate.

Par exemple, la couche de finition 4 est composée de 2 volumes de polyuréthane, 1 volume d'un durcisseur. Le polyuréthane est composé de 25% (10-25%) d'acetate de 2-methoxy-1-methylethyle, de 10% (2,5-10%) d'acetate de Nbutyle, de 2,5% (1-2,5%) de naphta aromatique léger, de 2,5% (1-2,5%) d'acetate d'isobutyle et de 2,5% (1-2,5%) de naphta lourd hydrodesulfure. Le reste du polyuréthane étant du diluant pour arriver à 100% de volume de polyuréthane. Le durcisseur de la couche de finition est composé de 40% (25-50%) d'hydrocarbures aromatiques en C8, de 40% (25-50%) d'homopolymère 1,6-diisocyanate d'hexaméthylène, de 10%(10-25%) d'acétate de 2-méthoxy-1-méthyléthyle, de 0,4% (<0,5%) de diisocyanate d'hexaméthylène. Selon une variante, il est utilisé un durcisseur dont la composition est la suivante : 25% (10-25%) de xylène, 25% (10-25%) d'hydrocarbures aromatiques en C8, 10% (2,5-10%) d'éthylbenzène, 10% (2,5-10%) de 2,4,6-tris(dimethylaminomethyl)phénol, 10% (2,5-10%) de 6-diazaoctane- 1,8-diamine et 2,5% (1-2,5%) de butanol. Le reste du durcisseur étant du diluant pour arriver à 100% de volume de durcisseur. De préférence, le diluant est composé de 50% (25-50%) d'acétate d'isobutyle, de 30% (25-50%) d'hydrocarbures aromatiques C8 et de 20% (10-25%) d'acétate de 2-méthoxy-1-méthyléthyle. Selon une variante, le diluant est composé de 50% (25-50%) d'acétate d'isobutyle, de 30% (25-50%) d'hydrocarbures aromatiques C8 et de 20% (10-25%) d'acétone ou selon une autre variante le diluant est composé de 25% (10-25%) d'acétate d'isobutyle, de 25% (25-50%) de d'hydrocarbures aromatiques C9, de 49,8% (25-50%) d'Acétate de 2-méthoxy-1-méthyléthyle et de 0.2% (<0.5%) d'acétate de 2-méthoxypropyle.For example, the topcoat 4 is composed of 2 volumes of polyurethane, 1 volume of a hardener. Polyurethane is composed of 25% (10-25%) of 2-methoxy-1-methylethyl acetate, 10% (2.5-10%) of Nbutyl acetate, 2.5% (1- 2.5%) of light aromatic naphtha, 2.5% (1-2.5%) of isobutyl acetate and 2.5% (1-2.5%) of heavy naphtha hydrodesulphide. The rest of the polyurethane is diluent to achieve 100% polyurethane volume. The topcoat hardener is composed of 40% (25-50%) of C8 aromatic hydrocarbons, 40% (25-50%) of hexamethylene 1,6-diisocyanate homopolymer, 10% ( 10-25%) of 2-methoxy-1-methylethyl acetate, 0.4% (<0.5%) of hexamethylene diisocyanate. According to one variant, is used a hardener whose composition is as follows: 25% (10-25%) of xylene, 25% (10-25%) of aromatic hydrocarbons in C8, 10% (2.5-10%) of ethylbenzene , 10% (2.5-10%) of 2,4,6-tris (dimethylaminomethyl) phenol, 10% (2.5-10%) of 6-diazaoctane-1,8-diamine and 2.5% ( 1-2.5%) of butanol. The remainder of the hardener is diluent to achieve 100% hardener volume. Preferably, the diluent is composed of 50% (25-50%) of isobutyl acetate, 30% (25-50%) of C8 aromatic hydrocarbons and 20% (10-25%) of acetate. 2-methoxy-1-methylethyl. According to one variant, the diluent is composed of 50% (25-50%) of isobutyl acetate, 30% (25-50%) of C8 aromatic hydrocarbons and 20% (10-25%) of acetone or according to another variant the diluent is composed of 25% (10-25%) of isobutyl acetate, 25% (25-50%) of C9 aromatic hydrocarbons, 49.8% (25- 50%) of 2-methoxy-1-methylethyl acetate and 0.2% (<0.5%) of 2-methoxypropyl acetate.

La peinture est mise en oeuvre par pistolage basse pression pour les panneaux, les faux-plafonds et portes, en plusieurs couches croisées jusqu'à obtention d'un lissage parfait.The painting is carried out by low-pressure spraying for panels, false ceilings and doors, in several layers crossed until a perfect smoothing.

Les essais suivants montrent la résistance à l'agression chimique du procédé de, revêtement. Sept plaques en acier sont revêtues d'une couche de peinture blanche dont l'épaisseur est mesurée, conformément à la norme NF T 30124. Les résultats sont présentés dans le tableau ci-dessous : Ref. échantillon Epaisseur du revêtement Mini maxi Moyenne Ecart-type 1 203 232 219 6 2 190 228 219 12 3 185 212 199 9 4 196 217 204 6 5 193 225 210 6 6 182 204 195 6 7 188 216 208 7 The following tests show the resistance to chemical attack of the coating process. Seven steel plates are coated with a layer of white paint whose thickness is measured, in accordance with standard NF T 30124. The results are presented in the table below: Ref. sample Thickness of the coating mini max Average Standard deviation 1 203 232 219 6 2 190 228 219 12 3 185 212 199 9 4 196 217 204 6 5 193 225 210 6 6 182 204 195 6 7 188 216 208 7

L'essai consiste à tester la résistance du revêtement au contact de peroxyde d'hydrogène à 35 volumes d'eau oxygénée déposés sur les plaques disposées horizontalement, soit sous la forme de gouttes de l'ordre de 5 mm de diamètre environ, soit en fines gouttelettes pulvérisées sous forme d'un brouillard.The test consists in testing the resistance of the coating in contact with hydrogen peroxide to 35 volumes of hydrogen peroxide deposited on the horizontally disposed plates, either in the form of drops of the order of about 5 mm in diameter, or fine droplets sprayed in the form of a fog.

En pratique, l'eau oxygénée, pulvérisée par brumisation, se dépose sur les parois. L'essai a donc consisté à exposer les plaques à un brouillard d'eau oxygénée pour obtenir un recouvrement par de fines gouttelettes. Ces essais ont donc été réalisés avec un test plus sévère que la pratique. En effet, l'oxygène actif qui dégrade le revêtement n'existe qu'en phase liquide. Des gouttes d'environ 5 mm de diamètre moyen ont donc été déposées sur les plaques de façon à prolonger le contact avec l'eau oxygénée.In practice, the hydrogen peroxide, sprayed by misting, is deposited on the walls. The test therefore consisted in exposing the plates to a mist of hydrogen peroxide to obtain a covering by fine droplets. These tests were therefore performed with a more severe test than practice. In fact, the active oxygen which degrades the coating exists only in the liquid phase. Drops of about 5 mm in average diameter were therefore deposited on the plates so as to prolong the contact with hydrogen peroxide.

Ce tableau (ci-dessus) montre des tests réalisés en conditions extrêmes avec un taux de particule de 2000/ppm. Le minimum acceptable est donc l'épaisseur de 182 micromètres (comprenant l'ensemble des deux couches d'apprêt et de finition). Le fait d'appliquer une couche d'apprêt d'un minimum de 100 micromètres et une couche de finition d'un minimum de 100 micromètres va permettre de garantir une épaisseur de revêtement de 200 micromètres au minimum. Ainsi, le procédé de revêtement va assurer une bonne tenue dans le temps et permet de résister à la décontamination au peroxyde d'hydrogène. L'épaisseur minimale de 200 micromètres, tel qu'indiqué dans le procédé de revêtement, permet largement de résister à la décontamination au peroxyde d'hydrogène. Classiquement, la phase de décontamination se déroule avec un taux de particule entre 50 et 450/ppm. Le taux de particule est nettement moins élevé que les tests réalisés avec un taux de particule de 2000/ppm. De cette manière, l'épaisseur de l'ensemble des deux couches (apprêt et finition, 200 micromètres au minimum) est donc suffisante pour résister à la phase de décontamination du peroxyde d'hydrogène.This table (above) shows tests performed in extreme conditions with a particle rate of 2000 / ppm. The minimum acceptable is therefore the thickness of 182 micrometers (including all two layers of primer and finish). Applying a primer of a minimum of 100 microns and a topcoat of a minimum of 100 microns will ensure a coating thickness of at least 200 microns. Thus, the coating process will ensure good resistance over time and can withstand decontamination with hydrogen peroxide. The minimum thickness of 200 microns, as indicated in the coating process, largely withstands hydrogen peroxide decontamination. Conventionally, the decontamination phase takes place with a particle ratio between 50 and 450 / ppm. The particle rate is significantly lower than the tests performed with a particle rate of 2000 / ppm. In this way, the thickness of all two layers (primer and finish, at least 200 micrometers) is sufficient to withstand the decontamination phase of hydrogen peroxide.

L'épaisseur maxi de 900 micromètres pour l'ensemble des deux couches (épaisseur de la couche d'apprêt : 450 micromètres et épaisseur de la couche de finition : 450 micromètres), se justifie par l'aspect économique. En effet, le fait de rajouter de l'épaisseur coûte plus cher en quantité d'apprêt ou de finition. C'est pourquoi, dépasser cette épaisseur n'est pas intéressant d'un point de vue économique.The maximum thickness of 900 micrometers for all two layers (thickness of the primer layer: 450 micrometers and thickness of the topcoat: 450 micrometers) is justified by the economic aspect. Indeed, the fact of adding thickness is more expensive in amount of primer or finish. Therefore, to exceed this thickness is not interesting from an economic point of view.

Un examen visuel et un essai de rayure à l'ongle sont effectués sur chaque zone de contact comme précisé sur le tableau ci-dessous : Résultats observés suite à un dépôt sous forme de gouttes : Durée du contact Observations 2h - rien à signaler visuellement - absence de cloquage - pas de modification de la dureté à l'ongle 4h - rien à signaler visuellement, légère auréole visible sous lumière incidence uniquement - absence de cloquage - pas de modification de la dureté à l'ongle 6h - rien à signaler visuellement, légère auréole visible sous lumière incidence uniquement - absence de cloquage - pas de modification de la dureté à l'ongle 7h - empreinte légèrement visible - absence de cloquage - rayable superficiellement à l'ongle 8h - empreinte légèrement visible - apparition de petites cloques dès la fin de l'essuyage ; la taille des cloques augmente au cours du temps après essuyage - rayable superficiellement à l'ongle ≥9h - l'eau oxygénée s'est évaporée - à l'emplacement de la goutte, on note la présence d'une grosse cloque, cloquagé entre la finition et le primaire, le primaire adhérant au support A visual examination and a nail scratch test are performed on each contact area as specified in the table below: Results observed following a deposit in the form of drops: Duration of contact observations 2 hours - nothing to report visually - absence of blistering - no change in nail hardness 4h - nothing to report visually, slight halo visible under light incidence only - absence of blistering - no change in nail hardness 6h - nothing to report visually, slight halo visible under light incidence only - absence of blistering - no change in nail hardness 7h - slightly visible footprint - absence of blistering - scratch superficially with the nail 8h - slightly visible footprint - appearance of small blisters at the end of the wiping; the size of the blisters increases over time after wiping - scratch superficially with the nail ≥9h - hydrogen peroxide has evaporated - at the location of the drop, there is the presence of a large blister, blistered between the finish and the primary, the primary adhering to the support

Pour réaliser ces tests, il a été déposé des gouttes d'eau oxygénée aussi souvent qu'il a été nécessaire pour voir l'effet de l'eau oxygénée sur une plaque munie du revêtement dans le temps.To perform these tests, drops of hydrogen peroxide were applied as often as was necessary to see the effect of oxygenated water on a plate with the coating over time.

Lorsqu'un brouillard d'eau oxygénée de 35 volumes est pulvérisé sur une plaque d'environ 20 mg/100 cm2, il s'évapore totalement après 30 minutes de repos à 23 °C.When a mist of hydrogen peroxide of 35 volumes is sprayed on a plate of about 20 mg / 100 cm 2 , it evaporates completely after 30 minutes of rest at 23 ° C.

Le revêtement ne présente aucun défaut visuel ni de modification de dureté à l'ongle. Le revêtement présente une tenue satisfaisante vis-à-vis du peroxyde d'hydrogène à 23°C pour des durées de contact inférieures à 6 heures. La pulvérisation de peroxyde d'hydrogène, sous forme d'un fin brouillard, n'entraîne aucun désordre. Le temps de contact est limité du fait de l'évaporation rapide du produit. Ce procédé de revêtement appliqué sur les panneaux donne des enceintes supportant la décontamination par le peroxyde d'hydrogène.The coating has no visual defect or hardness modification to the nail. The coating has a satisfactory performance with respect to hydrogen peroxide at 23 ° C. for contact times of less than 6 hours. The spray of hydrogen peroxide, in the form of a fine mist, does not cause any disorder. The contact time is limited because of the rapid evaporation of the product. This coating process applied to the panels provides enclosures supporting decontamination with hydrogen peroxide.

Claims (10)

  1. A coating process comprising the following successive steps:
    - a) preparation of the zone to be treated,
    - b) application of at least one coat of a primer (3) until a thickness of about from 100 to 450 micrometers is obtained, said coat of primer (3) being composed of at least 10 volumes of epoxy, 2 volumes of hardener and between 0 and 2 volumes of diluent, the epoxy of which comprises at least the following ingredients given as mass concentrations relative to the total volume of epoxy:
    - xylene: 10 - 25%,
    - epoxy resin 700 < mean mw < 1100: 10 - 25%,
    - zinc phosphate: 2.5 - 10%,
    - 1-methoxy-2-propanol: 2.5 - 10%,
    - epoxy resins mean mw < 700: 2.5 - 10%,
    - ethylbenzene: 2.5 - 10%,
    - heavy naphtha hydrodesulfide: 1 - 2.5%,
    - light aromatic naphtha: < 1%,
    - c) reconditioning of the zone to be treated,
    - d) application of a top coat (4) until a thickness of about from 100 to 450 micrometers is obtained, said top coat (4) being composed of at least 2 volumes of polyurethane, 1 volume of a hardener and between 0 and 10% of a diluent, the polyurethane of which comprises at least the following ingredients given as mass concentrations relative to the total volume of polyurethane:
    - 2-methoxy-1-methylethyl acetate: 10 - 25%,
    - n-butyl acetate: 2.5 - 10%,
    - light aromatic naphtha: 1 - 2.5%,
    - isobutyl acetate: 1 - 2.5%,
    - heavy naphtha hydrodesulfide: 1 - 2.5%.
  2. The coating process as claimed in claim 1, wherein step a) consists in de-siliconizing, sanding or stripping the zone to be treated and then cleaning and degreasing the zone to be treated.
  3. The coating process as claimed in claim 1, wherein step c) consists in leaving to dry for a minimum of 48 hours, sanding the coat of primer (3) to make it smooth and rinsing the primer (3) with clean water and then wiping and blotting it dry with a tack cloth so as to remove the dust.
  4. A coating process, wherein during step b) or during step d) as claimed in claim 1, the hardener comprises at least the following ingredients given as mass concentrations relative to the total volume of the hardener:
    - xylene: 10-25%,
    - C8 aromatic hydrocarbons: 10-25%,
    - ethylbenzene: 2.5-10%,
    - 2,4,6-tris(dimethylaminomethyl)phenol: 2.5-10%,
    - 3,6-diazaoctane-1,8-diamine: 2.5-10%,
    - butanol: 1-2.5%.
  5. A coating process, wherein during step b) or during step d) as claimed in claim 1, the hardener comprises at least the following ingredients given as mass concentrations relative to the total volume of the hardener:
    - C8 aromatic hydrocarbons: 25-50%,
    - 1,6-hexamethylene diisocyanate homopolymer: 25-50%,
    - 2-methoxy-1-methylethyl acetate: 10-25%,
    - hexamethylene diisocyanate: < 0.5%.
  6. A coating process, wherein during step b) or during step d) as claimed in claim 1, the diluent comprises at least the following ingredients given as mass concentrations relative to the total volume of the diluent:
    - isobutyl acetate: 25 - 50%,
    - C8 aromatic hydrocarbons: 25 - 50%,
    - 2-methoxy-1-methylethyl acetate or acetone: 10-25%.
  7. A coating process, wherein during step b) or during step d) as claimed in claim 1, the diluent comprises at least the following ingredients given as mass concentrations relative to the total volume of the diluent:
    - isobutyl acetate: 10 - 25%,
    - C9 aromatic hydrocarbons: 25 - 50%,
    - 2-methoxy-1-methylethyl acetate: 25-50%,
    - 2-methoxypropyl acetate: < 0.5%.
  8. A coating process, wherein during step b) or during step d) as claimed in claim 1, the diluent comprises at least the following ingredients given as mass concentrations relative to the total volume of the diluent:
    - C8 aromatic hydrocarbons: 50 - 75%,
    - butanol: 25 - 50%,
    - 4-methylpentan-2-one: 10 - 25%.
  9. The coating process as claimed in one of claims 1 to 8, wherein during step b), the coat of primer (3) is applied with a spray gun in crossed coats and during step d), the top coat (4) is applied with a spray gun in crossed coats, preferably in crossed coats that are oblique relative to the floor.
  10. A panel covered with the coating as claimed in claims 1 to 9.
EP13821853.2A 2012-12-24 2013-12-19 Coating method and panel having such a coating Active EP2934769B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1203591A FR2999961B1 (en) 2012-12-24 2012-12-24 COATING PROCESS AND PANEL HAVING SUCH A COATING
PCT/FR2013/000352 WO2014102465A1 (en) 2012-12-24 2013-12-23 Coating method and panel having such a coating

Publications (2)

Publication Number Publication Date
EP2934769A1 EP2934769A1 (en) 2015-10-28
EP2934769B1 true EP2934769B1 (en) 2017-03-15

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Application Number Title Priority Date Filing Date
EP13821853.2A Active EP2934769B1 (en) 2012-12-24 2013-12-19 Coating method and panel having such a coating

Country Status (5)

Country Link
US (1) US9816006B2 (en)
EP (1) EP2934769B1 (en)
ES (1) ES2621526T3 (en)
FR (1) FR2999961B1 (en)
WO (1) WO2014102465A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3044691B1 (en) * 2015-12-07 2019-06-21 Sarl Simon (Cepi) METHOD FOR RECOVERING A WHITE ROOM, PLASTIC FILM OF THE METHOD AND PANEL OF SUCH A FILM
KR102501403B1 (en) * 2021-05-28 2023-02-23 (주) 씨에프씨테라메이트 Composition for antibacterial film and preparing method of antibacterial film using thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040109853A1 (en) * 2002-09-09 2004-06-10 Reactive Surfaces, Ltd. Biological active coating components, coatings, and coated surfaces
UA91243C2 (en) * 2005-11-10 2010-07-12 Ппг Б.В. Metal substrate with epoxy based coating, process of coating, two layer coating system and use
FR2915690B1 (en) 2007-05-03 2009-07-24 Marie C Sarl PROCESS FOR PAINTING A NON-METALLIC SUPPORT

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Title
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Also Published As

Publication number Publication date
US9816006B2 (en) 2017-11-14
ES2621526T3 (en) 2017-07-04
EP2934769A1 (en) 2015-10-28
FR2999961B1 (en) 2015-10-30
FR2999961A1 (en) 2014-06-27
WO2014102465A1 (en) 2014-07-03
US20150344724A1 (en) 2015-12-03
WO2014102465A8 (en) 2015-03-19

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